JSFiddle - React, Tailwind, and code Playground

HTML

<div class="test">user1</div>
<div class="test">user2</div>
<div class="test">user2</div>
<div class="test">user3</div>
<div class="test">user4</div>
<div class="test">user5</div>
<div class="test">user6</div>

CSS

.test{
    display:none;   
}

JavaScript

function displayUsers(nr){
    ++i;
    $(".test").each(function(index, value){
        if(index==i){
         $(this).css("display","block");   
        }
    });

}
var i=0;
$(document).ready(function(){
   
    setInterval(displayUsers,5000);
});